rc->ungetidx = 0;\r
/* Setting buffer to _IOLBF because "when opened, a stream is fully\r
buffered if and only if it can be determined not to refer to an\r
rc->ungetidx = 0;\r
/* Setting buffer to _IOLBF because "when opened, a stream is fully\r
buffered if and only if it can be determined not to refer to an\r